This is a great plugin. For those who don't know how to use it, just download the zip file, select the Preferences button in Calibre, then Plugins and in the lower right corner of that screen, above the button marked "Add" and to the right of the empty line hit the browse button and browse to the zip file you downloaded. Select the zip file, then finish by hitting the Add button. That's it. I find that it will locate covers and book descriptions, etc. that I couldn't get before.